Electrochemistry represents one of the most intimate ways of interacting with molecules. This review discusses advances in synthetic organic electrochemistry since 2000. Enabling methods and synthetic applications are analyzed alongside innate advantages as well as future challenges of electroorganic chemistry.

Synthetic Organic Electrochemical Methods Since 2000: On the Verge of a Renaissance

Recent Advances in the Baylis−Hillman Reaction and Applications

Intermolecular dehydrogenative Heck reactions.

Heterogeneous Catalysts for the One-Pot Synthesis of Chemicals and Fine Chemicals

In recent years, the concept of combining transition metal catalysis and organocatalysis has emerged as a promising strategy for developing new and valuable reactions, and has attracted considerable attention as it could potentially enable unprecedented transformations not currently possible by use of the transition metal complex or the organocatalyst alone. In this critical review, this strategy is illustrated with several recent outstanding examples, with the aim of shedding light on the synthetic utilities and potentials of this concept as a novel tool in organic synthesis (118 references).

Combining transition metal catalysis and organocatalysis: a broad new concept for catalysis

The oxidative properties of chromium-exchanged zeolite (CrE-ZSM-5) towards the oxidation of alcohols and benzylic methylene groups with t-butyl hydroperoxide have been evaluated. In most cases, high yields of ketones have been obtained. Experimental evidence is presented that these reactions were, at least in part, homogeneously catalyzed by leached chromium.

Chromium-exchanged zeolite (CrE-ZSM-5) as catalyst for alcohol oxidation and benzylic oxidation with t-BuOOH

Three racemic α-fluorinated benzyl β-ketoesters have been synthesized by electrophilic fluorination with Selectfluor™. They were submitted to our well established palladium-mediated cascade reaction (deprotection, decarboxylation and protonation of the resulting enolic species) producing optically active α-fluoro ketones. With benzyl 2-fluoro-1-tetralone-2-carboxylate as substrate, ( S )-(−)-2-fluoro-1-tetralone with up to 65% enantiomeric excess was obtained using quinine as the chiral base and Pd/C type 807104 from Merck as the heterogeneous catalyst.

Catalytic asymmetric protonation of fluoro-enolic species: access to optically active 2-fluoro-1-tetralone

The chemical recycling of the poly(ethylene terephthalate), (PET), has been successfully carried out by glycoly- sis in the presence of bis (2-hydroxyethyl) terephthalate (BHET) resulting in the formation of hydroxytelechelic oligomers. These oligomers were then treated with carboxytelechelic poly(!-caprolactone) oligomers of —n = 2300 and —n = 730 g·mol -1 molecular weight, in the absence or presence of the titanium tetrabutyloxide (Ti(OBu)4) as a catalyst to get multiblock copolyesters. The chemical structure of the synthesized copolyesters was investigated by size exclusion chro- matography (SEC) and proton Nuclear Magnetic Resonance ( 1 H NMR) spectroscopy. Moreover the differential scanning calorimetry (DSC) was used to explore their thermal properties. The ester-ester interchange reaction was observed between the two oligopolyesters, was studied and discussed in detail.

http://www.expresspolymlett.com/letolt.php?file=EPL-0005154&mi=c

Chemical recycling of poly(ethylene terephthalate). Application to the synthesis of multiblock copolyesters

Synergy or Competition between Palladium-Catalysis and KF/Alumina-Mediation for the Allylic Substitution of the Acetates of Baylis–Hillman Adducts by Phenols

Abdelkhalek Riahi

Papers

Chromium-exchanged zeolite (CrE-ZSM-5) as catalyst for alcohol oxidation and benzylic oxidation with t-BuOOH

Catalytic asymmetric protonation of fluoro-enolic species: access to optically active 2-fluoro-1-tetralone

Chemical recycling of poly(ethylene terephthalate). Application to the synthesis of multiblock copolyesters

Synergy or Competition between Palladium-Catalysis and KF/Alumina-Mediation for the Allylic Substitution of the Acetates of Baylis–Hillman Adducts by Phenols

Catalysed Asymmetric Protonation of Simple Linear Keto‐Enolic Species − A Route to Chiral α‐Arylpropionic Acids